Kindly note!
Normal fluidic thread locker is not designed to be applied or cure under water and attempts to apply it under water will ultimately fail. Nor can regular thread locker be applied to the thread in air and allowed to cure before the screw is mounted under water. There will be no adhesion.

If removing the propeller underwater for any reason, do not reuse the screws when mounting again under the water. Please contact Flexofold for replacement screws that have the pre-applied thread locker.

When reusing the screws out of the water, make sure to apply a medium strength version of thread locker such as Loctite 243 (blue).

Never use a thread locker on the shaft nut. It will be difficult to dismount again.